Connection for heat exchange systems



Patented Jan. 4, 1944 SYSTEM Joseph L. Bradfleld, Seattle, Wasln,asslgnor of twenty-five per cent to Paul Wayne Bradfleld,

Tacoma, Wash.

Application April 18, 1941, Serial No. 388,71914 3 Claims. (01. 285106)This invention relates to improvements in a connection for heat exchangesystems and one that is particularly useful in radiant heat systems.

It is well known in the art of heating and cooling buildings that wall,ceiling or floor areas of such buildings may be provided with pipe ortubes that receive a heating or cooling fluid and conducted throughoutthe areas according to a predetermined arrangement to either radiate orabsorb heat depending on the temperature of the' fluid.

This invention has for its object the provision of novel and usefulmeans for installing the tubing or piping in place in the wall, ceiling,or floor or a building into'which the system is to be inan improvedcontrol mechanism for regulating the flow and temperature of the fluidthroughout the system. a

A further object of my invention relates to a method of preserving theintegrity of the surface of the plaster which covers the secondarytubing and the supply and return lines of tubing by preventing anydisruptive strains within the plaster due to the alternate expansion andcontraction of the tubing.

Other objects and advantages of the invention will be apparent duringthe course of the following descriptionwherein I have illustrated apreferred form of my invention.

Figure l is a bracketed view of the tubular elements that are coupledtogether to form an intersection between a supply or return tube and asecondary distribution tube,

Figure 2 is a perspective view of an assembly of supply and return tubeswith the secondary distribution tubes associated therewith,

Figure 3 is a plan view of a portion of a ceiling having my systeminstalled thereon and indicating the manner in which it is imbedded inthe covering plaster,

Figure 4 is a sectional view taken on lines 44 of Figure 3, and

Figure 5 is a sectional view taken of Figure 3.

.In heating an area in a house according to my on line 5-5 invention Ipropose to provide the heating element or tubing in the ceiling. Undersuch circumstances a feeder or supply tube I05 is run across an area. Inthe approximate center thereof and parallel thereto is provided thereturn tube- I05--both of these are of about the same capacity. Theseare connected respectively to the supply pipe and return pipe of aheating system.

At spaced intervals along the tubes I05 and I08 a notch I0! is formedand a notched saddle fitting I08 is soldered or brazed thereto in themanner clearly shown in Figure 2 so that the notches I01 and the notchI09 in the fitting I08 are coincident with each other. The fluid whichmay flow through the pipe I05 or I06 may pass into or out of thesecondary loops H0 and III. In a regular installation a secondary loopat IIO, for example, has an and inserted into the saddle I08 on the pipeI05 and its other end is inserted into a saddle I08a on the pipe I06.Similarly a loop I is associated with the saddles I08 and MM on theopposite side thereof. It will be seen that hot water flowing throughthe pipe I05 will flow in both directions from the saddle I08 out aroundthe loops H0 and III and then converge again in the saddle I080 to flowback through the tubing I05 to the return header and the heating plant.I

To provide a recessed support for the supply and return saddle fittingtubes I05 and I06 spacer blocks II2 are fastened to the opposite sidesof a ceiling joist I I3 and positioned as shoufn or a pair of joists inany convenient location in the room. Nailing strips II4 are positionedon the spacer blocks I I2 with their lower edge in line with the loweredge of the joist I I3. The plaster base or lath H5 is nailed to thestrips III. In this manner .a cavity is formed along each side of ajoist or along one side of each of a pair of joists in'each room toreceive the supply and .return tubes, I05 and I06 leaving only thesaddle fitting I00 and I 08a protruding below the face of the plasterbase or lath. The several loops H0 and I II are inserted in saddlefittings I08 and IBM and fastened to the lower face of the plaster baseor lath. A wire mesh H6 is then stretched below the loops and isanchored by means of nails Ill nailed through to the joist to form asupporting member for the loops H0 and I I I and to act as a plasterreinforcement.

Plaster is troweled over the whole structure. As .the plaster hardensafter a predetermined period of time has elapsed, it is conventionalpractice to heat the fluid in the system and perit it to flow throughoutthe distribution system ;comprising the feed and return -pipes l05. andH06 and the distribution loop'sl I30 and! which would thereupon expandand in the hardening material around them formpo'ckets. y

In this instance the temperature is ordinarib run up higher than wouldbe normally used so that a maximum degree of expansion can be obtained.The formation of these pockets which will always be present in theplaster, for example, will provide room for any subsequent expansion andcontraction that may take place in the distribution system inordinarytuse and thus will be avoided unnecessary cracking of theplaster.

I claim:

1. For use in heat exchange system wherein secondary tubing is connectedwith primary tubing, a connection comprising: a tubular member having aport in its wall, and a ported conductor member secured to said tubularmember transversely thereof with the axis of the tubular memberbeingsubstantially tangential with the bore of the conductor member, theports of the two members being positioned for fluid intercommunicationfrom one member to the other member.

2. A connection comprising: a tubular member having a port in its wall,and a conductor member having a port in its wall, said conductor memberbeing secured to said tubular member transversely thereof with the boreof the conductor member being inset into the bore of the tubular memberand the ports of the two members being in position for fluidintercommunication from onemember to the other member.

3. A connection for use in heat exchange systems, said fitting.comprising: a body having a fluid conduction passage therethrough, saidbody having a second fluid conduction passage therethrough transverselyof the first passage, the axis of one of said passages beingsubstantially tangential with an edge of the other passage.

. JOSEPH L. BRADFIELD.

